From what I have seen and heard, I think you are correct. These people do not want civility, they want open season on what they consider to be their mortal enemies.:2 cents:
The sad reality is that most politicians on both side are only concerned about scoring points for their own political party. The Left wanted this person to be a Tea Bagger because it helps makes their case that the Tea Party, Republicans, Conservatives, Talk Radio, and Fox News are a bunch of violent, racist, gun slinging, red necks, etc.... Now if the suspect ended up being an illegal immigrant, then the Right would have exploited the situation to prove how correct Arizona was in enforcing its immigration policy. But then again, the Left would have counteracted would blame Republicans for lax gun laws and others will say that this "illegal immigrant" is part of a larger conspiracy made up by the Republicans, and so on and so on and so on.